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Main jade producing countries. Jade is an umbrella term for two different types of decorative rocks used for jewelry or ornaments.Jade is often referred to by either of two different silicate mineral names: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminum in the pyroxene group of minerals). [1]
The Ministry of Mines now conducted the extraction and sale of jade exclusively through their auctions (emporiums). From 1964 to 1975, dollar volume of jade sales remained less than $1 million. The first time jade sales reached more than $1 million was in 1976. The amount of jade sold in dollar terms achieved $1 billion in 2010.
Red beryl is an extremely rare gemstone. For every 150,000 diamonds mined, only one red beryl is found. A two-carat red beryl is considered to be as rare a find as a 40-carat diamond.
Jadeite is the principal mineral making up the most valuable form of jade, a precious stone particularly prized in China. Most gem-quality jadeite jade comes from northern Myanmar. Jade tools and implements have been found at Stone Age sites, showing that the mineral has been prized by humans since before the beginning of written history.
Gemstones of the World revised 5th edition, 2013 by Walter Schumann ISBN 978-1454909538 Smithsonian Handbook: Gemstones by Cally Hall, 2nd ed. 2002 ISBN 978-0789489852 hide
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